1. A survery of 80 people showed that 40% of those survery do not read newspapers.
Question: How many of those survey do not read newspaper?
=> 80 people = total number of people that took the survey
=> 40% are the interest rate of those people that do not read newspaper based on the survey.
=> 40% / 100% = .40
Solutions
=> 80 * .40 = 32
Thus, 32 of those people do not read newspaper.